# Fluids

Classical Mechanics Level 4

A pivot bearing used on the shaft of an electrical instrument is shown .Oil with a viscosity of  $$0.010 \text{lb. s/ft}^2$$ fills the $$0.001\text{ in}$$ gap between the rotating shaft and the stationary base. Find the frictional torque (in $$\text{ft.lb}$$) on the shaft when it rotates at $$5000 \text{ rpm}$$.

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